[misc]: re-run CI

The trigger check failed while cancelling stale Buildkite builds, which ends
the job before the merge-gate build is started, so this PR has no gate result
rather than a failing one. Nothing here needs changing; this empty commit only
produces the synchronize event that runs the workflow again.

The underlying fault is fixed in hao-ai-lab#1762.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: KyleNeverGivesUp